Fourths to mondula leak and d



(No Model.)

O. LEAK.

PRESSER FOOT FOR SEWING MAGHINES.

No. 390,606. Patented 001;. 2,1888.

FUEL PIE. 3.

INV ENTEIR,

45 M gew UNITED STATES IATEN'T @FFICE.

CRAPO LEAK, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF THREE- FOURTHS TO MONDULA LEAK AND D. V. B. HENARIE, BOTH OF SAME PLACE.

PRESSER-FOOT FOR SEWING-=MACHINES.

:PECIl-ICATION forming part of Letters Patent No. 390,606, dated October 2, 1888.

Application filed June 15, 1887. Serial No. 241,342. (No model.)

To all whom it. may concern.-

Be it known that l, ORAPO LEAK, a citizen of the United States, residing in the city and county of San Francisco, and State of California, have invented a new and useful Double- Adjusting-Spring Sewing-Machine Foot, of which the following is a specification.

My invention relates to improvements in presser-feet for sewing-machine feed. It will be understood by reference to the accompanying drawings.

Figure 1 is a side elevation of a Singer presser-foot with my improvement attached. Fig. 2 is a reversed view of the same. Fig. 3 is a perspective view of the same, and Fig. 4 is a plan view of my improved attachment detached from the presser-foot. Figs. 5 and 6 are similar views to Figs. 1 and 2, with the foot B substituted by the springs D and E. Fig. 7 is a side elevation showing the operation of my attachment when passing from a thicker to a thinner surface.

The following is the construction and operation of my improvement:

, A represents an ordinary presser-foot, such as is employed by the Singer machine; B, my subsidiary self-adjusting presser-foot; O, the pivot or hinge of my self-adjusting presserfoot.

D and E show spring attachments designed to effect the self-adjustment by the elasticity of the springs, thus producing a partial effect which will answer in most cases.

F represents several thicknesses of fabric, and G represents but a single thickness. 7

As the fabric is passed along under the presserfoot from a greater number of thicknesses to a single thickness, the hinge 0 allows the front of the foot to drop down to a bearing upon the lesser thickness of fabric, as shown in Fig. 7, thus securing a holding of the fabric both in front and back of the needle, and in moving in the opposite direction, or from a thinner to a thicker fabric, the heel of the presser-foot remains down upon the thinner until the needle has passed to the thicker amount of fabric, when it returns to a level bearing upon the thicker fabric.

I am aware that it is not new to employ a single spring bifurcated, the branch of the bifurcationserving as a passage for the needle and both branches stop on the same line or point; but I am not aware that any one has heretofore provided a presser-foot with two flat springs, one being of greater length than the other. By this means I am enabled to produce a device at a minimum expense, being able to utilize small pieces of material and avoid the time and labor of slotting them.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

In presser-leet for sewing-machine feed, the combination, with a presserfoot of a sewingmachine, of two independent springs, D and E, respectively secured thereto upon its under surface, one directly above the other and of unequal lengths, substantially as specified.

ORAPO LEAK. lVitnesses:

JOHN H. Rnns'ronn, L. E. REDSTONE. 

